From 249866e3d1e11dc72eaa1305f4bb479ded92ef38 Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Tue, 9 Jul 2024 13:58:20 +0200
Subject: reorganized file structure

Moved c files into src/.
Corrected VERSION file.
Removed BUILD and FILES.
---
 src/socket_setup.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 src/socket_setup.c

(limited to 'src/socket_setup.c')

diff --git a/src/socket_setup.c b/src/socket_setup.c
new file mode 100644
index 0000000..fb65fa2
--- /dev/null
+++ b/src/socket_setup.c
@@ -0,0 +1,99 @@
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include "byte.h"
+#include "socket_if.h"
+#include "ip.h"
+
+/**
+  @file socket_setup.c
+  @author djb, feh
+  @source ucspi-tcp6
+  @brief setup listening socket
+*/
+
+int socket_accept(int s,char ip[16],uint16 *port,uint32 *scope_id)
+{
+  struct sockaddr_in6 sa;
+  unsigned int dummy = sizeof(sa);
+  int fd;
+
+  fd = accept(s,(struct sockaddr *)&sa,&dummy);
+  if (fd == -1) return -1;
+
+  if (sa.sin6_family == AF_INET) {
+    struct sockaddr_in *sa4 = (struct sockaddr_in*)&sa;
+    byte_copy(ip,12,V4mappedprefix);
+    byte_copy(ip+12,4,(char *)&sa4->sin_addr);
+    uint16_unpack_big((char *)&sa4->sin_port,port);
+    if (scope_id) *scope_id = 0;
+  } else {
+    byte_copy(ip,16,(char *)&sa.sin6_addr);
+    uint16_unpack_big((char *)&sa.sin6_port,port);
+    if (scope_id) *scope_id = sa.sin6_scope_id;
+  } 
+
+  return fd;
+}
+
+int socket_accept4(int s,char ip[4],uint16 *port)
+{
+  struct sockaddr_in sa; 
+  unsigned int dummy = sizeof(sa); 
+  int fd; 
+
+  fd = accept(s,(struct sockaddr *) &sa,&dummy);
+  if (fd == -1) return -1; 
+
+  byte_copy(ip,4,(char *) &sa.sin_addr);
+  uint16_unpack_big((char *) &sa.sin_port,port);
+
+  return fd; 
+}
+
+int socket_listen(int s,int backlog)
+{
+  return listen(s,backlog);
+}
+
+int socket_ipoptionskill(int s)
+{
+  int r;
+
+  r = setsockopt(s,IPPROTO_IP,1,(char *) 0,0); /* 1 == IP_OPTIONS */
+  r = setsockopt(s,IPPROTO_IPV6,1,(char *) 0,0); 
+  
+  return r;
+}
+
+int socket_ip6anycast(int s)
+{
+  int opt = 1;
+  int r;
+
+#ifdef GEN_IP_PKTINFO /* Linux */
+   r = setsockopt(s,IPPROTO_IP,GEN_IP_PKTINFO,&opt,sizeof(opt));
+#elif IP_PKTINFO  /* Solaris */
+   r = setsockopt(s,IPPROTO_IP,IP_PKTINFO,&opt,sizeof(opt));
+#elif IP_RECVDSTADDR  /* BSD */
+   r =  setsockopt(s,IPPROTO_IP,IP_RECVDSTADDR,&opt,sizeof(opt));
+#elif IPV6_RECVDSTADDR
+   r = setsockopt(s,IPPROTO_IPV6,IP_RECVDSTADDR,&opt,sizeof(opt));
+#endif
+   return r;
+} 
+
+int socket_dualstack(int s)
+{
+  int opt = 0;
+
+  return setsockopt(s,IPPROTO_IPV6,IPV6_V6ONLY,&opt,sizeof(opt));
+}
+
+int socket_nodualstack(int s)
+{
+  int opt = 1;
+
+  return setsockopt(s,IPPROTO_IPV6,IPV6_V6ONLY,&opt,sizeof(opt));
+}
-- 
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